It is not news that Manhattan is a massively dense urban sprawl, but it hasn't always been like this. In a short time lapse from the NYU Stern Urbanization Project, the expansion of Manhattan's rapid development is shown year-by-year. It is a fascinating look at where the development of the City was at in each period of it's relatively brief history.

The video was created Shlomo Angel and Patrick Lamson-Hall and there is a corresponding writeup if you interested in learning more about the visualization.